Been working on optimizing the RCS file parsing module
(within the ViewCVS package). Having Python fork/exec with
a pipe to "rlog" is still a lot faster than having Python
directly parse the file. But it is getting closer. I'm now
going to try memory-mapping the file and parse tokens that
way. Could be much faster.

I want this to be really fast because it would be nice to
use manual parsing rather than rlog output since there is a
small amount of data loss. In particular: it is hard to
reconstruct the actual RCS revision tree from just the rlog
output. (hmm; maybe "hard" rather than "impossible")

The second reason is that this module will be used by
Subversion's cvs2svn tool. To convert SourceForge's 49
gigabytes of CVS repository, I want this to be as fast as
possible :-)